Spartan Electronics needs to construct x-bar and s-charts for circuit boards that are purchased from an outside supplier. A critical dimension is the distance between two holes on the board that are supposed to be 5 cm apart. Use the data, consisting of 15 samples of size 4 found shown below. What are the center line and upper control limit for s chart? 16, 15.4, 17, 15.1 13.9, 15.2, 13.2, 14.1 17.4, 15.8, 12.7, 14.4 15, 12.5, 13.5, 15 14.3, 13.9, 14.6, 14.1 16.8, 12.8, 13.6, 12.7 13.9, 15.6, 14.9, 15.9 16.3, 13.5, 14, 14.5 15.7, 16, 14.8, 14.6 12.4, 15.3, 13.6, 12.5 15.4, 13.4, 16.9, 14.5 15, 15.8, 14.7, 17 12.7, 15.3, 15.9, 15.4 13.7, 16.2, 12.7, 13.7 14.6, 14.8, 13.1, 15.7

	A. 1.041, 3.235
	B. 1.041, 2.685
	C. 1.185, 2.685
	D. 1.185, 3.235